I could be wrong but I was always under the impression that the magic number if you will was 600 for whitetail deer and 1000 for elk. Also I shoot the same powerbelt, but always considered it a 100 yard and under projectile only because of personal preference. If I wanted to shoot longer distances I would go to a sabot load.

Actually I think people need to concern themselves more with shot placement. I remember reading a post of a person killing a moose with 80 grains of Pyrodex and a patched roundball in .54 caliber which would be 228 grain I believe at a distance of 160+ yards. The ball penetrated the moose and lodged in or passed through (I forget) the animal's heart. Again, shot placement. This was done with a T/C Renegade sidelock.